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dwdm: Definition and Recommended Links

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In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fiber by using different wavelengths (colours) of laser light to carry different signals. This allows for a multiplication in capacity, in addition to enabling bidirectional communications over one strand of fiber. 'This is a form of frequency division multiplexing (FDM) but is commonly called wavelength division multiplexing.'[1]
The term wavelength-division multiplexing is commonly applied to an optical carrier (which is typically described by its wavelength), whereas frequency-division multiplexing typically applies to a radio carrier (which is more often described by frequency). However, since wavelength and frequency are inversely proportional, and since radio and light are both forms of electromagnetic radiation, the two terms are equivalent.
Source: Wikipedia (http://en.wikipedia.org/wiki/DWDM)

other great electronics sites:ee toolbox site

- dwdm
  - In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fiber by using different wavelengths (colours) of laser light to carry different signals. This allows for a multiplication in capacity, in addition to enabling bidirectional communications over one strand of fiber. 'This is a form of frequency division multiplexing (FDM) but is commonly called wavelength division multiplexing.'[1]
    The term wavelength-division multiplexing is commonly applied to an optical carrier (which is typically described by its wavelength), whereas frequency-division multiplexing typically applies to a radio carrier (which is more often described by frequency). However, since wavelength and frequency are inversely proportional, and since radio and light are both forms of electromagnetic radiation, the two terms are equivalent.
    Source: Wikipedia (http://en.wikipedia.org/wiki/DWDM)
    (Note: The Electronic Engineers Toolbox provides an alternative set of featured links for this word at http://www.cera2.com/dwdm.htm)
    Featured Links:
    
    Dense Wavelength Division Multiplexing: ATG’s Communications & Networking Technology Guide Series
    Over the last decade, fiber optic cables have been installed by carriers as the backbone of their interoffice networks, becoming the mainstay of the telecommunications infrastructure. Using time division multiplexing (TDM) technology, carriers now routinely transmit information at 2.4 Gb/s on a single fiber, with some deploying equipment that quadruples that rate to 10 Gb/s. The revolution in high bandwidth applications and the...
    http://www.urec.fr/hd/DWDM/CIENA/dwdm_ciena.pdf
    
    Optical Networking And Dense Wavelength Division Multiplexing (DWDM)
    This paper deals with the twin concepts of optical networking and dense wavelength division multiplexing. The paper talks about the various optical network architectures and the various components of an all-optical network like Optical Amplifiers, Optical Add/Drop Multiplexors, Optical Splitters etc. Important optical networking concepts like wavelength routing and wavelength conversion are explained in detail. Finally this paper deals with. . .
    http://www.cse.wustl.edu/~jain/cis788-99/ftp/dwdm/index.html
    
    Dense Wavelength Division Multiplexing (DWDM) Performance and Conformance Testing
    Dense wavelength division multiplexing (DWDM) is a technology that uses multiple lasers to transmit many wavelengths of light simultaneously over a single optical fiber. Each signal is modulated by different source data (text, voice, video, etc.) and travels within its own unique color band (wavelength). DWDM enables the existing fiber infrastructure of the telephone companies and other carriers to be dramatically increased.
    http://www.iec.org/online/tutorials/dwdm_perf/
    
    Hot Topics in Networking: Voice Over IP, DWDM, Ethernet
    Very good list of links from a major professor in Network technologies - Networking History and Trends References Quality of Service over IP References Label Switching References Gigabit Ethernet References Storage Area Networks References IP over DWDM References Wireless Data Networks References Voice over IP References A list of references on additional topics
    http://www.cse.wustl.edu/~jain/refs/hot_refs.htm
    
    Dense Wavelength Division Multiplexing
    DWDM (Dense Wavelength Division Multiplexing) is a fiber optic transmission technique that works by combining and transmitting multiple signals simultaneously on the same fiber in a dense wavelength grid. DWDM combines multiple optical signals to one single fibber in order to amplify the transmission and to increase its bandwidth capacity. DWDM technology offers many key benefits such as: ? Allowing the transmission of...
    http://www2.rad.com/networks/2002/dwdm/wdm_main.htm
    
    Terracom Training Institute Videos
    Free snippets of Teracom's DVD-video courses: VoIP, wireless, networking, telecommunications. Video tutorials are full-length lessons from the DVDs. Full DVD quality downloads are available at teracomtraining.com
    http://www.youtube.com/user/teracomtraining
    
    Dense Wavelength-division Multiplexing Tutorial
    Dense wavelength-division multiplexing (DWDM) revolutionized data transmission technology by increasing the capacity signal of embedded fiber. This increase means that the incoming optical signals are assigned to specific wavelengths within a designated frequency band, then multiplexed onto one fiber.
    http://www.fiber-optics.info/articles/dwdm.htm
    
    Dense Wavelength Division Multiplexing (DWDM) Tutorial
    This tutorial addresses the importance of scalable DWDM systems in enabling service providers to accommodate consumer demand for ever-increasing amounts of bandwidth. DWDM is discussed as a crucial component of optical networks that allows the transmission of e-mail, video, multimedia, data, and voice carried in Internet protocol (IP), asynchronous transfer mode (ATM), and synchronous optical network/synchronous digital hierarchy (SONET/SDH)...
    http://www.iec.org/online/tutorials/dwdm/
    
    Path Level Traffic Grooming in WDM Optical Networks
    Traffic grooming continues to be a rich area of research in the context of WDM optical networks. Past research studies that focused on improving network utilization required high speed optical cross-connects that could switch at the packet or burst level. Such optical technologies are expensive and hard to fabricate. Recently, there have been some research into designing new architectures focused on optical grooming without using fast...
    http://www.amazon.com
    
    Setting A New Standard for Bandwidth
    This cutting edge technology - when combined with network management systems and add-drop multiplexers - enables carriers to adopt optically-based transmission networks that will meet the next generation of band-width demand at a significantly lower cost than installing new fiber.
    http://www.urec.cnrs.fr/hd/DWDM/CIENA/dwdm_ciena.pdf
    
    Explanation: these links are provided as part of our EE glossary project, which seeks to identify the most prominent keywords in embedded systems, embedded software, realtime and rtos, dsp (digital signal processing), system-on-a-chip, microprocessors and microcontrollers, and other constituent elements for embedded systems. While we seek to keep most of the links up-to-date, the user is refered to other primary electronic-based search sites such as: cera2.com, embedded.com, or EDN Magazine. If you have any suggestions of links or definitions, please email!

Last updated: Sat Aug 14 2010
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